A new toxicology report says the man who killed six people before killing himself at the Sikh Temple in August had alcohol in his heart.

However, because there wasn't any alcohol his blood stream, the alcohol might have been a result of body tissues breaking down and decomposing, the Milwaukee County Medical Examiner's Office said.

Wade Michael Page's sister told investigators that she suspected her brother had become a heavy drinker and went on to say that Page had become more intense and lost his sense of humor in the year leading up to the Aug. 5 shooting.

The FBI issued a four-page statement Tuesday saying the agency had concluded its investigation into the rampage.